The selection of problems from the book group, the box group, the card group, and the envelope group in regular rotation has at least the advantage of adding the interest which comes from variety. The following arrangement is suggestive for this feature. (See B on page 137.)

First Grade

I. 111. Mounting folders......................... 19

II. 121. Square box .............................. 67

III. 131. Mounted drawings ....................... 92

IV. 141. Envelope folder ........................... 111

V. 112. Booklet folder ........................... 20

VI. 122. Square tray ............................. 68

VII. 132. Book-marks.............................. 93

VIII. 142. Square envelope ........................ 112

Planning Of Courses

IX. 113. Pocket note-books......................... 21

X. 123. Rectangular tray ......................... 69

XL 133. Calendar ............................... 94

XII. 143. Pocket for clippings ...................... 113

XIII. 114. Book of color schemes ................... 24

XIV. 115. Drawing-book............................ 25

XV. 116. Laundry list ............................. 27

Second Grade

I. 211. Paper portfolio............................ 29

II. 221. Small square box.......................... 71

III. 231. Desk blotters ............................ 96

IV. 241. Paper bag .............................. 114

V. 212. Paper portfolio with laps................... 30

VI. 222. Rectangular open box ..................... 71

VII. 232. Photo mount ............................ 98

VIII. 242. Mailing envelope......................... 116

IX. 213. Book of designs ......................... 30

X. 223. Box with reinforced corners ............... 72

XL 233. Glass cover.............................. 100

XII. 243. Long mailing envelope ................... 116

XIII. 214. Weather record .......................... 31

XIV. 215. Receipt-book............................. 34

XV. 216. Note-book ............................... 35

XVI. 217. Paged blank books ....................... 36

Third Grade

I. 311. Scrap-book .............................. 42

II. 321. Covered small box ....................... 74

III. 331. Post cards ............................... 101

IV. 341. Photo riling envelope..................... 117

V. 312. Small sewed pamphlet.................... 44

VI. 322. Pencil box with fitted cover................ 76

VII. 332. Page holder ............................. 102

VIII. 342. Long filing envelope ..................... 119

IX. 313. Sewed pamphlet with reinforced back...... 46

X. 323. Candy box ............................... 77

XL 333. Shipping tags........................... 102

XII. 343. Large riling envelopes .................... 120

XIII. 314. Cloth covered portfolio ................... 47

XIV. 324. Folding box .............................. 80

XV. 315. Glued booklet............................ 48

XVI. 3 [6. Cloth bound book ........................ 49

Fourth Grade

I. 411. Pocket paper file......................... 52

II. 421. Pin box with cover....................... 81

III. 431. Postal scale .................. . . ........ 103

IV. 441. Paper bag with folds ...........,.......... 121

V. 412. Desk paper file ........................... 54

VI. 422. Post card box ........................... 83

VII. 432. Folder picture mount ..................... 105

VIII. 442. Flat envelope file ........................ 123

IX. 413. Note-book covers ......................... 54

X. 423. Original box ............................ 84

XL 433. Desk pad ................................ 107

XII. 443. Book envelope file ....................... 126

XIII. 414. Portfolio with cloth corners................ 58

XIV. 424. Pen box ................................. 86

XV. 415. Bound scrap-book ........................ 61

XVI. 425. Sliding box .............................. 88

XVII. 416. Bound drawings ......................... 61

XVIII. 417. Rebound book or bound magazine......... 62