Use concrete materials to model addition and subtraction problems involving one- and two-digit numbers

1. Here is the Number! 4 + 1, 4 + 10
2. Here is the Number! 1 + 1, 1 + 10
3. Here is the Number! 2 + 1, 2 + 10
4. Here is the Number! 3 + 1, 3 + 10
5. Here is the Number! 5 + 1, 5 + 10
6. Here is the Number! 6 + 1, 6 + 10
7. Here is the Number! 7 + 1, 7 + 10
8. Here is the Number! 8 + 1, 8 + 10
9. Here is the Number! 9 + 1, 9 + 10
10. Add Board: 30 + 8
11. Add Board: 20 + 4
12. Add Board: 15 + 3
13. Add Board: 50 + 6
14. Add Board: 20 + 9
15. Add Board: 21 + 6
16. Add Board: 13 + 12
17. Add Board: 20 + 20
18. Add Board: 12 + 7
19. Add Board: 13 + 6
20. 100 Grid: Start at 27. Add 3 tens
21. 100 Grid: Start at 7. Add 4 tens
22. 100 Grid: Start at 25. Add 3 tens
23. 100 Grid: Start at 54. Add 2 tens
24. 100 Grid: Start at 22. Add 5 tens
25. 100 Grid: Start at 15. Add 7
26. 100 Grid: Start at 28. Add 8
27. 100 Grid: Start at 14. What is 11 more?
28. 100 grid: 11 more than 33
29. 100 grid: Find 9 more than 27
30. On the Board: 60+2
31. On the Board: 20+3
32. On the Board: 40+7
33. On the Board: 50+8
34. On the Board: 60+4
35. The Chicken Story: seventeen + twelve
36. Now Add This! 26+21, 26+31
37. 100 grid: Start at 73. Add 7.
38. 100 grid: Start at 45. Add 8.
39. 100 grid: Start at 26. Add 5.
40. 100 grid: Start at 68. Add 4.
41. 100 grid: Start at 52. Add 7.
42. Thinking in tens: Add 10, 19 to 19
43. Thinking in tens: Add 10, 11 to 14
44. Add board 40 + 14 = *
45. Add board 56 + 11 = *
46. Add board 71 + 18 = *
47. Add board 45 + 23 = *
48. 100 grid: 73-7
49. 100 grid: 23-9
50. 100 grid: 48-9
51. 100 grid: 74-7
52. 100 grid: 82-8
53. 100 grid: 54-6
54. 100 grid: 61-5
55. 100 grid: 69 take away 11
56. 100 grid: 82 take away 9
57. 100 grid: 25 take away 9
58. 100 grid: 57 take away 9
59. 100 grid: 44 take away 9
60. 100 grid: 98 take away 9
61. 100 grid: 88 take away 11
62. 100 grid: 11 take away 11
63. 100 grid: 23 take away 11
64. 100 grid: 64 take away 11
65. 100 grid: 73 take away 11
66. 100 grid: 99 take away 11
67. Subtract from 100: 100 - 30, 40 & 20
68. Subtract from 100: 100 - 20, 30 & 70
69. Subtract from 100: 100 - 70, 20 & 40
70. Subtract from 100: 100 - 40, 90 & 50
71. Subtract from 100: 100 - 60, 20 & 100
72. Red Blocks 10 - 3
73. Red Blocks 10 - 5
74. Red Blocks 10 - 6
75. Red Blocks 10 - 7
76. Red Blocks 10 - 8
77. Red Blocks 10 - 9
78. The Chicken Story: sixty + eleven