Encourage students to take advantage of the free resources available at their local library. They may know they can get books, but they may not know that they can check out movies, video games, use the computer, or join community reading programs (many of which have incentives for summer reading).
Like cabbage and cabbage sprouts, Brussels sprouts are a cool weather crop. They should be harvested when the sprouts are small, compact and bright green. Avoid yellowing sprouts with signs of wilt rot or insect damage. Harvest sprouts when they are no larger than 1 to 1 1/2 inches in diameter.
Wait until the leaf stems have three segments. Check the stems. If the stems have three or more clusters of leaves, they are mature enough to harvest from. Stems with one or two segments should be left alone. Most parsley plants will be ready to harvest from within 70 to 90 days after you initially plant them.