A study of over 40,000 written entries in Irish Annals and ice core measurements shows a strong correlation between the occurrence of volcanic eruptions and extreme cold weather in Ireland over a 1200 year period.
Glaciers: Then and Now - Classroom Activity Kit

Classroom activity kit includes Glaciers: Then and Now Activity Description, Student Worksheet, and one or more sets of laminated glacial image pairs from the National Snow and Ice Data Center.
Single set of eight laminated glacial image pairs - $14.99
Four sets of eight laminated glacial image pairs - $49.99. This set is appropriate for a class size of ~20, with each group of five students working with a set of eight image pairs.
