The first readers that come to mind are McGuffy's; Nova Scotia in 1850-1870 was influenced greatly by New England as a whole- the closest trading and schooling partner for maritime Canada.

McGuffy's New Sixth Eclectic Reader, 1857, Wilson, Hinkle, Phila.
McGuffy's First Eclectic Reader- [New reprint by Van Nostrand Reinhold; much interest by educators and the series has been reprinted, $15 or less for each].

Lindley Murray, 1834, "The English Reader." NY

Key to Pelton's New and Improved Series of Outline Maps, Containing C. Pelton, 1851, "All the Important Geographic Names in the known World Arranged in Verse for Musical Recitation," Sower and Barnes.
[My grandfather found this in an old cabin in Colorado, I have it and find it very entertaining!

Sullivan, Robert, "Geography Generalized,...", pub, 1849 in London by Longman, Brown et al.

Tower and Walker, 1855, "North American First Class Reader, the Sixth Book," NY. {A series of these).

Collecting old school books on particular topics is a widespread hobby, and many of the old books are expensive now. Search "19th century schoolbooks" in Abebooks, etc., and you will find more.