Some students struggle with fractions because some teachers taught them fractions in a way they can not see the relation between fractions and daily life. In this Spanish-language video, a lady explains fractions. She draws a pizza sectioned into six equal pieces, one piece is then selected and eight "unit" (dots) placed on it. She then asks, "what was the whole number whose sixth part equals eight?" This explanations also works for proportions. Additionally Ratios and rates are explained in a different video . I add a third video about fractions, which was made by NASA.