Approx birth month. First month is the month they're conceived and the one beside it is the approximate month of birth, if they're born full term. Handy guide if you want to try to have a baby in a specific month.
Install a scale so students can practice math by weighing vegetables, calculating selling price for school farm markets, maybe try two different organic fertilization methods on same vegetables planted same way and weigh the differences, etc.
The Ultimate Survival of the Fittest - 250 Million Start the Race, All Will Die but One
250 Million Attempt The Journey, But Only One Will Make It… #infographic #sperm #conception 1000+ sperm roll off the production line every heartbeat & 250 million leave the male body at ejaculation. It's a big race with only 1 penetrating the egg. An amazing infographic.