ORTDD: ORT Develope and Decoce
| Series | Title | YL | Words |
| ORTDD1 total | Decode and Develop Stage 1 PACK | 0.0 | 16 |
| ORTDD1① | Lost Gloves, The | 0.0 | 3 |
| ORTDD1② | Puddles | 0.0 | 1 |
| ORTDD1③ | Just for Mum | 0.0 | 3 |
| ORTDD1④ | Fly Away | 0.0 | 2 |
| ORTDD1⑤ | Feed the Birds | 0.0 | 3 |
| ORTDD1⑥ | Fun in the Snow | 0.0 | 4 |
| ORTDD1+ total | Decode and Develop Stage 1+ PACK | 0.1 | 274 |
| ORTDD1+① | Hop, Hop, Pop! | 0.1 | 37 |
| ORTDD1+② | Catkin the Kitten | 0.1 | 45 |
| ORTDD1+③ | In the Trolley | 0.1 | 51 |
| ORTDD1+④ | Trampoline, The | 0.1 | 42 |
| ORTDD1+⑤ | Enormous Crab, The | 0.1 | 55 |
| ORTDD1+⑥ | Caterpillar, The | 0.1 | 44 |
| ORTDD2 total | Decode and Develop Stage 2 PACK | 0.2 | 603 |
| ORTDD2① | Odd Egg, The | 0.2 | 106 |
| ORTDD2② | Out! | 0.2 | 108 |
| ORTDD2③ | Fire! | 0.2 | 79 |
| ORTDD2④ | Gulls' Picnic, The | 0.2 | 100 |
| ORTDD2⑤ | Red Noses | 0.2 | 106 |
| ORTDD2⑥ | Ball Pit, The | 0.2 | 104 |
| ORTDD3 total | Decode and Develop Stage 3 PACK | 0.3 | 646 |
| ORTDD3① | Floppy and the Puppets | 0.3 | 102 |
| ORTDD3② | Monkeys on the Car | 0.3 | 106 |
| ORTDD3③ | Dragons! | 0.3 | 116 |
| ORTDD3④ | Enormous Picture, The | 0.3 | 130 |
| ORTDD3⑤ | Gran and the Go-karts | 0.3 | 98 |
| ORTDD3⑥ | Helicopter Rescue | 0.3 | 94 |
| ORTDD4 total | Decode and Develop Stage 4 PACK | 0.4-0.5 | 1,057 |
| ORTDD4① | Stars, The | 0.4-0.5 | 159 |
| ORTDD4② | Long Legs | 0.4-0.5 | 186 |
| ORTDD4③ | Floppy and the Skateboard | 0.4-0.5 | 170 |
| ORTDD4④ | Gran's New Glasses | 0.4-0.5 | 194 |
| ORTDD4⑤ | Birthday Candle, The | 0.4-0.5 | 164 |
| ORTDD4⑥ | Seal Pup, The | 0.4-0.5 | 184 |
| ORTDD5 total | Decode and Develop Stage 5 PACK | 0.6 | 2,192 |
| ORTDD5① | Highland Games | 0.6 | 290 |
| ORTDD5② | Orchid Thief | 0.6 | 318 |
| ORTDD5③ | Rats! | 0.6 | 379 |
| ORTDD5④ | Pet Called Cucumber, A | 0.6 | 385 |
| ORTDD5⑤ | Bush Fire! | 0.6 | 408 |
| ORTDD5⑥ | Bessie's Flying Circus | 0.6 | 412 |
| ORTDD6 total | Decode and Develop Stage 6 PACK | 0.6-0.7 | 3,075 |
| ORTDD6① | Two Left Feet | 0.6-0.7 | 530 |
| ORTDD6② | Land of Letters | 0.6-0.7 | 488 |
| ORTDD6③ | On the Stage | 0.6-0.7 | 542 |
| ORTDD6④ | New Year Race, The | 0.6-0.7 | 489 |
| ORTDD6⑤ | May Morning | 0.6-0.7 | 515 |
| ORTDD6⑥ | Bigfoot Mystery, The | 0.6-0.7 | 511 |
| ORTDD7 total | Decode and Develop Stage 7 PACK | 0.7-0.8 | 5,578 |
| ORTDD7① | Portrait Problem, The | 0.7-0.8 | 965 |
| ORTDD7② | Tall Tale, A | 0.7-0.8 | 893 |
| ORTDD7③ | Detective Adventure, The | 0.7-0.8 | 901 |
| ORTDD7④ | Time Capsule, The | 0.7-0.8 | 950 |
| ORTDD7⑤ | Holiday in Japan | 0.7-0.8 | 955 |
| ORTDD7⑥ | Magic Tricks | 0.7-0.8 | 914 |
| ORTDD8 total | Decode and Develop Stage 8 PACK | 0.9-1.0 | 6,867 |
| ORTDD8① | Ogre's Dinner, The | 0.9-1.0 | 1,123 |
| ORTDD8② | Lucky Find, A | 0.9-1.0 | 1,148 |
| ORTDD8③ | Strange Old House, The | 0.9-1.0 | 1,084 |
| ORTDD8④ | Beehive Fence, The | 0.9-1.0 | 1,239 |
| ORTDD8⑤ | Secret Pop Star, The | 0.9-1.0 | 1,073 |
| ORTDD8⑥ | Good Turn, A | 0.9-1.0 | 1,200 |
| ORTDD9 total | Decode and Develop Stage 9 PACK | 1.0-1.4 | 8,416 |
| ORTDD9① | Travelling Players, The | 1.0-1.4 | 1,353 |
| ORTDD9② | Princes in the Tower | 1.0-1.4 | 1,415 |
| ORTDD9③ | Fair-haired Samurai, The | 1.0-1.4 | 1,352 |
| ORTDD9④ | Fireball in the Sky | 1.0-1.4 | 1,401 |
| ORTDD9⑤ | Journey, The | 1.0-1.4 | 1,499 |
| ORTDD9⑥ | Knight in Town, A | 1.0-1.4 | 1,396 |
| ORTDD1 More A total | Decode and Develop Stage 1 More A PACK | 0.0 | 14 |
| ORTDD1 More A① | Next Door | 0.0 | 2 |
| ORTDD1 More A② | Dogs in the Mud | 0.0 | 4 |
| ORTDD1 More A③ | Stop! | 0.0 | 1 |
| ORTDD1 More A④ | Fish Tank, The | 0.0 | 3 |
| ORTDD1 More A⑤ | Big Spin, The | 0.0 | 3 |
| ORTDD1 More A⑥ | Wheels | 0.0 | 1 |
| ORTDD1+ More A total | Decode and Develop Stage 1+ More A PACK | 0.1 | 297 |
| ORTDD1+ More A① | Picture Book Man, The | 0.1 | 51 |
| ORTDD1+ More A② | In the Tent | 0.1 | 47 |
| ORTDD1+ More A③ | Bag in the Bin, The | 0.1 | 56 |
| ORTDD1+ More A④ | Stuck! | 0.1 | 40 |
| ORTDD1+ More A⑤ | Big Red Bus, The | 0.1 | 48 |
| ORTDD1+ More A⑥ | Sock, The | 0.1 | 55 |
| ORTDD2 More A total | Decode and Develop Stage 2 More A PACK | 0.2 | 637 |
| ORTDD2 More A① | Got a Job? | 0.2 | 114 |
| ORTDD2 More A② | New Gingerbread Man, The | 0.2 | 97 |
| ORTDD2 More A③ | Hiccups | 0.2 | 103 |
| ORTDD2 More A④ | Gorilla on the Run! | 0.2 | 107 |
| ORTDD2 More A⑤ | Big Bunch of Flowers, A | 0.2 | 104 |
| ORTDD2 More A⑥ | Catch It! | 0.2 | 112 |
| ORTDD3 More A total | Decode and Develop Stage 3 More A PACK | 0.3 | 790 |
| ORTDD3 More A① | King of the Castle | 0.3 | 130 |
| ORTDD3 More A② | Bug Hunt | 0.3 | 121 |
| ORTDD3 More A③ | Mister Haggis | 0.3 | 132 |
| ORTDD3 More A④ | Walk in the Sun, A | 0.3 | 135 |
| ORTDD3 More A⑤ | Green Sheets | 0.3 | 139 |
| ORTDD3 More A⑥ | Road Burner | 0.3 | 133 |
| ORTDD4 More A total | Decode and Develop Stage 4 More A PACK | 0.4-0.5 | 1,082 |
| ORTDD4 More A① | Finger Snapper | 0.4-0.5 | 188 |
| ORTDD4 More A② | Bowling Trip, The | 0.4-0.5 | 186 |
| ORTDD4 More A③ | Minibeast Zoo, The | 0.4-0.5 | 186 |
| ORTDD4 More A④ | Good Luck Stone, The | 0.4-0.5 | 177 |
| ORTDD4 More A⑤ | Top of the Mountain | 0.4-0.5 | 187 |
| ORTDD4 More A⑥ | Kid Rocket | 0.4-0.5 | 158 |
| ORTDD5 More A total | Decode and Develop Stage 5 More A PACK | 0.6 | 2,110 |
| ORTDD5 More A① | Queen of the Waves | 0.6 | 345 |
| ORTDD5 More A② | Crab Island | 0.6 | 326 |
| ORTDD5 More A③ | Where Next? | 0.6 | 343 |
| ORTDD5 More A④ | Gotcha! | 0.6 | 357 |
| ORTDD5 More A⑤ | In the Dark | 0.6 | 368 |
| ORTDD5 More A⑥ | Frog's Tale, The | 0.6 | 371 |
| ORTDD1 More B total | Decode and Develop Stage 1 More B PACK | 0.0 | 15 |
| ORTDD1 More B① | Round and Round | 0.0 | 3 |
| ORTDD1 More B② | From Cow to Cup | 0.0 | 4 |
| ORTDD1 More B③ | Big Paws | 0.0 | 2 |
| ORTDD1 More B④ | Splash! | 0.0 | 1 |
| ORTDD1 More B⑤ | Egg Fun | 0.0 | 2 |
| ORTDD1 More B⑥ | All the Kit | 0.0 | 3 |
| ORTDD1+ More B total | Decode and Develop Stage 1+ More B PACK | 0.1 | 347 |
| ORTDD1+ More B① | Picnic on the Hill, The | 0.1 | 55 |
| ORTDD1+ More B② | Big, Bad Snake, The | 0.1 | 53 |
| ORTDD1+ More B③ | Lemon Pip, The | 0.1 | 58 |
| ORTDD1+ More B④ | Too Hot | 0.1 | 54 |
| ORTDD1+ More B⑤ | Tin Can Man, The | 0.1 | 71 |
| ORTDD1+ More B⑥ | Hit and Miss | 0.1 | 56 |
| ORTDD2 More B total | Decode and Develop Stage 2 More B PACK | 0.2 | 627 |
| ORTDD2 More B① | Quick, Pedal! | 0.2 | 94 |
| ORTDD2 More B② | King and Queen | 0.2 | 111 |
| ORTDD2 More B③ | Falcon, The | 0.2 | 102 |
| ORTDD2 More B④ | Hush! | 0.2 | 100 |
| ORTDD2 More B⑤ | Comic Fun | 0.2 | 112 |
| ORTDD2 More B⑥ | Wishing Well, The | 0.2 | 108 |