Your family seems to be doing well with homeschooling. Many others here will probably also do well. But two things stand out as I read your story: church and Texas.
And I am reminded of many stories of people who wish to 'protect' their children from beliefs that the parents don't share. Those beliefs may involve religion, science, politics, vaccination, sex, sports, etc. Certain US states and foreign countries encourage eccentric viewpoints on these matters.
Texas is famous for leading the fight against science and in favor of ignorance. Well beyond its borders, the state influences the publication of schoolbooks that millions of schoolchildren are saddled with--books that tend to encourage belief in creationism and deny climate change.
In those situations, for instance in the Middle East and parts of the American South, people often cling to beliefs that don't blend well in modern society. We face a current epidemic of measles in the US because a superstitious segment of the population doesn't believe in preventive treatment. Private, charter, and home schooling encourage the propagation of unusual viewpoints and make it difficult to assure a beneficial and uniform education to all children.
Many slashdot readers are capable of leading their children successfully into the future, but some who use alternative education systems will bring their children to ruin. Just as standards benefit engineering efforts, they can benefit education. Every child at a given level of education should be able to prove that they have been exposed to a standardized level of knowledge.
Yes, certain individuals may be limited by standards. Let's hope they can be identified, accelerated through the system and stimulated to be their best. Others may need extra time to absorb the necessary knowledge. But leave no gaps in their exposure to the information they need to survive our world.